The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**Bob B.** · 01-07-2006, 04:50 AM

I think it will work fine, too. You might have to mke some new lines, that dual diaphragm booster is pretty long. The difference in master cylinders between '67 1/2 tons and 3/4 tons is that the 1/2 ton has a 1" bore, and the 3/4 has a 1.125" bore. From the outside, the master cylinders look the same.

01-07-2006, 04:50 AM	#8
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,396	Re: Power brake booster question I think it will work fine, too. You might have to mke some new lines, that dual diaphragm booster is pretty long. The difference in master cylinders between '67 1/2 tons and 3/4 tons is that the 1/2 ton has a 1" bore, and the 3/4 has a 1.125" bore. From the outside, the master cylinders look the same. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.